Sanding nozzle



Nov. 1, 1955 H. N. suDDuTH SANDING OZZLE Filed Aug. 6, 1952 www INVENTOR Henrg Norron Sudduch ATTORNEY United States Patent Gilce 2,722,442 Patented Nov. l, 1955 SANDING NOZZLE Henry Norton Sudduth, Watertown, N. Y., assigner to The New York Air Brake Company, a corporation of New Jersey Application August 6, 1952, Serial No. 302,926

4 Claims. (Cl. 291-46) This invention relates to an improved distensible sanding nozzle for use in connection with fluid pressure sanding systems, e. g. the system disclosed in the Campbell Patent No. 2,196,977 which issued on April 16, 1940.

The sanding nozzles used with sanding equipment of the type disclosed in the above patent are necessarily located close to the rails and to the wheels of the vehicles on which the sanding apparatus is mounted. The nozzles are so alined that they deliver sand to the point of contact between the wheel and the rail. Because of their location, such sanding nozzles are subject to the accumulation of ice, snow, dirt, and the like. It has been proposed in the past that nozzles of this type be made of rubber or similar material in order that they might distend when the sanding pressure was applied, thus permitting the expulsion of any accumulated matter from the nozzle. These nozzles were self-sustaining and therefore had to be realtively short. Experience has shown that under severe operating conditions when the Sanders are idle for extended periods of time the foreign matter accumulates to an extent that it penetrates beyond the nozzle into the sanding pipe or hose on which the nozzle is mounted. The sanding pipe or hose is not distensible and therefore foreign matter which accumulates at this point may not with certainty be cleared from the sanding apparatus and the proper functioning of the sanding device thereby prevented.

According to the present invention a sanding nozzle is provided which is characterized by a controlled distension when under pressure and which is of such length that accumulation of foreign matter is effectively limited to the nozzle itself.

The nozzle is of generally cylindro-conical form. It is provided with an integral supporting lug which is located near the junction between the cylindrical and conical portions of the body. The cylindrical portion of the body is provided with a fabric reinforcing layer which effectively limits the distension which can occur in this portion of the nozzle, but which leaves the conical tip free to distend in the manner characteristic of the nozzle shown in the Campbell patent referred to above. This fabric reinforcing layer is located adjacent the outer surface of the cylindrical portion of the nozzle so that the inner surface of the nozzle remains soft and pliable. This feature is desirable because it facilitates the expulsion of rough or jagged pieces of accumulated foreign material. The layers of reinforcing fabric also serve to distribute the slight distension of the cylindrical portion of the body evenly so that the tendency of the nozzle to be misalined is reduced.

in some applications of a sanding nozzle embodying the present invention, the nozzle may be of such a length that it is self sustaining and in that event the integral supporting lug may be omitted.

Figure 1 is an axial section of the sanding nozzle.

Figure 2 is a transverse section taken on the line 2--2 of Figure l. The conventional cross hatching has been 2 omitted from this figure in order to clarify the showing of the fabric reinforcing layers.

The sanding nozzle comprises an elongated tubular body having a conical tip portion 6 and a cylindrical body portion 7. An axial bore 8 extends through the nozzle. The bore 8 is provided with an enlarged portion 9 which is adapted to receive the sanding ypipe or hose (not shown). A supporting lug 11 is formed integrally with the body 7 and is located near the junction between the conical portion 6 and the cylindrical body 7. The cylindrical body portion 7 is encircled by a plurality of fabric laminae 12 which are located adjacent its outer surface. Additional laminae 13 may be provided to encircle the enlarged portion 9 in order to prevent any distension of the nozzle in this region. A plurality of parallel laminae 14 which lie in planes parallel with the nozzle axis extend radially outward through the lug 11. The inner ends of the laminae 14 are splayed apart and extend circumferentially of the cylindrical portion 7 but do not encircle this portion. The laminae 14 may be spliced or woven into the laminae 12 at their inner ends. It will be apparent that the enlarged portion 9 is adapted to receive the sanding pipe and may be clamped to this pipe by means of a conventional hose clamp.

The lug 11 is adapted for connection to any suitable hanger. The alinement of the nozzle may be adjusted by suitable manipulation of the sanding pipe and the hanger. The alinement of the nozzle is maintained during the sanding operations by means of the hanger and the fabric laminae 12. If it be assumed that the nozzle is in operation and has been subject to the accumulation of a considerable amount of foreign material, it will be apparent that the application of sanding pressure through the nozzle will cause the cylindrical body portion to distend slightly. This distension is closely limited by the reinforcing laminae 12. The reinforcing laminae 12 in addition to limiting the amount of the distension of the portion 7 cause this distension to be equally distributed throughout this portion whereby the tendency for the distension to cause misalinement of the nozzle axis is effectively eliminated. Thus delivery of sand to the proper location is assured by proper adjustment of the sanding pipe and the hanger.

The laminae 1.4 of the lug 11 are so contrived that the nozzle is properly sustained by thev hanger. The innermost of the laminae 14 does not encircle the cylindrical portion 7 and hence the distension of this portion is not adversely affected by these innermost laminae.

It will be obvious that in those embodiments in which the lug 11 is omitted that the laminae 12 maintain the proper alinement of the nozzle during the sanding operation, because of their action which distributes the slight distension of the cylindrical portion evenly.

The conical portion 6 is designed in a conventional manner and is freely distensible. It should be noted that the side walls of the nozzle in this portion are slightly tapered being thinner at their outer ends. This causes distension of the conical portion 6 to occur rst at its outermost end which facilitates the expulsion of the accumulated foreign material. This feature is known in the art, and no claims are directed thereto.

What is claimed is:

l. A sanding nozzle for connection to a sand delivery connection comprising an elongated, tubular, distensible cylindro-conical body of rubberlike material; at least one encircling layer of fabric reinforcing material in the walls of said body and extending substantially throughout the cylindrical portion thereof and permitting limited distension of the cylindrical portion; and a supporting lug formed integrally with said body and located near the junction between the cylindrical and conical portions of said body.

2. A sanding nozzle for connection to a sand delivery connection comprising an elongated, tubular, distensible cylindro-conical body of rubberlike material; and at least one encircling layer of fabric reinforcing material in the walls of said body and extending substantially throughout the cylindrical portion thereof and permitting limited distension of the cylindrical portion.

3. A sanding nozzle for connection to a sand delivery connection comprising an elongated, tubular, distensible cylindre-conical body of rubberlike material; at least one encircling layer of fabric reinforcing material in the walls of said body and extending substantially throughout the cylindrical portion thereof and permitting limited distension of the cylindrical portion; a supporting lug formed integrally with said body and located near the junction between the cylindrical and conical portions of said body; and a plurality of fabric laminae in said lug each lying in a plane parallel with the axis of the nozzle and extending radially through the lug.

4. A sanding nozzle for connection to a sand delivery connection comprising an elongated, tubular, distensible cylindre-conical body of rubberlike material; at least one encircling layer of fabric reinforcing material in the walls References Cited in the le of this patent UNITED STATES PATENTS 671,774 Prosser Apr. 9, 1901 1,037,760 Heaslet Sept. 3, 1912 2,038,249 Stoody Apr. 2l, 1936 2,196,977 Campbell Apr. 16, 1940 FOREIGN PATENTS 513,375 France Oct. 30, 1920 .futin 

